Carbureter.



l. LHAWXHUHST. In. E. F. NICLM.

CARBLIRETIER.`

Armcmon man un. 3. ma.

Patented Jan. 2, 1917.

HHH!! ne ntpors:

egg.

den@ end-'f Queens and Sta l' etomizing theA fuel,- und Vor chis's of fcarb .'29

UmTED smrlsf PATENT'OFF-ICE.

CARBUBETx-n.

. 'Application nie-ii umn s i'i'sls. seal Nq.,

ltlon.

.j O ur invention lreliites to car-hunters. .de signed 0;1 .15

be. ueed"v'vith :iriten'al oombus. tion engines toproduceu combustiblemixture froxai'r'and a -suit with and more .particularly to with thepower.systeinsV of'autoinohiles u nd 'similzijr self-propelled vehiclesnndfm which a* pre'liurinary4 mixture containing' e 'e comparatively`large portionof liquidiuelis :frst fformed bythe ato'mizin-g action of:i

' vto ow p :1st.'a fuel' Asupplynozile by the suction-or val duomgaction 'of the engine,

diluted to pro! nary mixture is subsequently duce a proper combustlble,further supply of nil-'adm ports und pussngesf controlled by unAautolnzlticu'lly operating'v air-Valve. the opera'tlo-n4 of which islike\\ is e.. dependen't upon the. suction or v'afcuum `producing actionofthe engine l.with 4which the ca normal opera-tion A.of t'he engine,that is when 45' ing valve referred to com'esinto operation :the eng'uneis'` operatingunder'norniel load Pm '4 .ure 'suitable for sup# .isrunning slowly conditions, :und ut highduce' u 'comlulstible mint speed,serre to ng, and 'When'the' A v:1s-the speed of the engine;v increasesand ad- 4 und isopernting, n

hy .dilute the rich 'mixtu mits an addition of nirto there` re and form'a le. mixture for 4use when thrilled rits n'QImulzSpeed, ndez;4n'orl'nul Vload condinl quantity v.proper combustib the engine hns- :i

tions.

.The objects 4of our invention are to pr'o able, .liquid by mixing 4airthere' that typeureters designed for? use inixture" by.' 'a v ittedfthrough l rlgureterl'isused. .In such cnrburetersthe 'elements which pro- -mlxture 1n the.

tionnI'Letters Pzitent..4

1 -Patented dan. .2, 19'1 81,865, 1

type aborereferred ch -a betterand'u more econ( mica] passa gesdilute-therichmigiture produced l the 'operation of the auxiliary airialve' 'regulated` end controlled, ments off-seid and the ,move-."v'alv'e cushioned, whereby a 'more uniformsction xof seid valve is'secured; to provide a' carburetor in which'l the various'pnrts maybemore readily adjusted relative to one .another, and.. the

lll) re whereby the' supply of a'uxilf.

'may

adapted tothe 'engine with which it 4is to be used,thanhas heretoforeusually been Jth'e case; 'to provide a simple in construction undeffective for the purpose for .which it isdesigned; undone in, which the.combusti inore nearly uniform throughout the enti-re ronge' of speednndlo engine uitlmvl'rioh it fis to be used than has een the c aseinprior carbureters ofthe type to which our invention relates; andtoother- -wise iniproveA upon andenhence the etli- 'ciency of corburetersinternal combustionengines.`

)Vith the. above and other-'objects of ini' ventioninviewg-our'invention 4consists in the improved' czfu'b-ureterfor internalcombustion engines illustrated in the accompanying .rlraxvi1 1g.' desori'.icntion; :rnd w-irticulurly claimed, and in Such" vu riutiohs will heobvious to those s lri'lled which ou'I` inve n 4ap'plic'ution andwherein ad- .conditions of the accompanying; and' form- 1-the-'preferred -en'lbodinienty of our invention is illustrated', undwherein4 the sinne referfA eure numerals are empl like pfui-ts in vthe"Several figures: Figure l is :l view showing n section of our improvedmirhureter taken' -upon .a' vertical central ble .mixture will bedesigned for usewth and 'modificationsthereof as 'V eyed .to 'designateplane indicated by the -line1-1, Fig.2; and 105 F1g.' 2 isaJ-viewshowinga section thereof upon transverse planes indicated by the broken line 22, Fig` 1.

Referring to the drawing, the reference numeral 3 designates the main orbody portion and 4: the hase portion orvbottom of a two-part exterioreasing within which a carburetiug and mixing chamber 5 is provided, saidbody and base portions being formed separate from one another andsecured together by a threaded-connection at the lower end of the bodyportion in the preferred embodiment ot' our invention illustrated.

Depending from the bottom or base member -1 is a tubular portion 6within which a vertically arranged air passage 7 is formed, said passagebeing preferably contracted at its middle portion to form a Venturi, as

shown; the lower end of said air passage being in open communicationwith the atmosphere through a spider 8 in threaded engagement with thelower 'end of the tubular portion, and an adjustable connection 9; whichconnection is provided in order that the carburetor ma be connected witha source of heated air, if desired. The upper end of the air passage 7extends through an annular projection 10 formed upon the lower casingmember 4 and extending up into the interior of the casing, as shown, andter-` minates in an upwardly extending annular flange 11.

The reference numeral 12 designates a float chamber surrounding the deending tubular portion 6 and held in place tween the spider 8 and theunderside of the base member 4, and to which chamber a liquidV friel issupplied through a fuel supply pipe to be connected with the nipple 13,the level of fuel in the float chamber bein controlled and kept constantby means o a float 14 acting upon a fuel supply. valve 15 through abifurcated lever 16 ivotally supported at 17, as is usual incarliureters of the type to which our invention. relates.

Located within the air passage 7 is a fuel supply nozzle 18- which 1splaced in communication with the interior of the float chamber through afuel supply passage 19 as shown; and the carburetor casing is providedwith an outlet passage 20 throu h which the combustible mixture flows tot e engine with which the carburetor is used, the flow through saidpassage being ordinarily controlled by means of a valve 21 carried by anoscillating shaft 22, as is usual in carbureters.

Surrounding the upper end of the air pas sage 7 a'nd located within thecarburetor casing is a vertically adjustable annular valve seat 23, thesame being preferably adjustable upon the annular projection 10 as bybeing in threaded engagement therewith, as shown; the adjustment of saidvalve seat being provided for by providing a project- .through one ormore of the auxiliary air inlet ports 27 provided in the earburetcrcasing for the admission of additional air to dilute the rich mixturefirst formed; and said valve seat may be rotated to adjust its position,vertically, by means of a suitable tool passed through an air port andinserted into the recesses. It will be understood, however, that othermeans may be provided for adjusting thc valve scat, as our inventionincludes an adjustable valve seat in combination with other elements,together with means fora'djusting said valve scat, as particularlyclaimed hereinafter. A spring pressed plunger 28 is carried by theadjust able valve seat inV the form of our invention illustrated, thelower end of which plunger enters one of a series of depressiom` 29provided in the base portion 4 to thereby hold said seat in position andprevent accidental rotation of the seat after it has been adjusted intoproper position.

The interior of the carbureter casing is formed with or shaped toprovide annular concentric portions 250, 31 of different diameters, and32 designates a vertically movable annular air valve located within'thccarbureter casing and having concentric annular `portions 33, 34 whichmove in contact with the concentric portions aforesaid of the interiorof the casing, whereby an air chamber 35 is provided between the airvalviand the carburetor easing. 'lhrI lower end ol' (he said air valveis provided with an annular )ortion 25 which coperates with theadjustable valve seat2l and contacts therewith when said air valve is'in its lowermost position; and the lowerend of said valve is providedwith a depending annular 'portion or rim 36 which lies opposite undobstructs the flow of air through the auxiliary air inlet ports 27 whensaid valve is in itsI lowermost position, as shown.

The air valve 32 is operatively connected with a metering or needlevalve 37, the lower end of which enters into and controls the llow offuel through the fuel supply nozzle 18, the upper end of said needlevalve being connected with a erossbar 38 carried by the air valve asshown; and 39 designates an air passage extending from the interior ofthe carburetor casing through the wall ofto How into said air chamberfrom the -ex .teruel atnriosphere, and to prevent the flow of aix` fromsaidelia'mber. The urea of the gir passage 40 ma fbe I egulated and ad-5 justed by means o` a valve 4,3 in threaded engagement with the 'valveeasing llvand l saidV regulating valve is held inposition after theparts have been properly adjusted by meansofa lock nut 44.

Whenthe engine \v ith \'vl1iel1 ourA improved Carbureter 1s used 1sjrunnmg without load,

or idling, as when the engine is permitted to runf. at reduced speedwhile the automobile is standing still, and also when theengiueisstarted 0r is operating ai low speed, the auxiliary air valve 32is l1n its lowermost position with its annular portion resting upon theadjustable valve seat 23 and all the air neeessaryto form thecombustible mix! ture then enters the carburetei` cas'in through the airpassage-7 andntomif/es the liquid fuel supplied through the fuel lsupplynozzle 18. 4 .g-

It is important 4that the air and fuel shall 5 be soproportioned astoseeure Va 'smooth and uniform operation of the engine-without misfireswhenthe same is operating under the conditions above referred to, Vandlike v Wise important, that the ,consumption of fuel 55* bei* throughthe 32, whereupon t 0- at suehtimes=sl iallf be as low asfpossible,which results or ends are secured by the vertieally adjustable valveseat 23, it being obviousthatl upward movement imparted to saidvalveseat'will be transmitted through 5 'the air valve l32 to the fuelcontrollin valve 37, thus moving'said4 valve out of te vfuel supplynozzle'liexd permitting a more co,V

pious supply of fuel to the stream o' air 4flowing past said nozzle;ywhile "downward o movement of 'said-adjustable seat willlle-aceompaniedbyva. decrease-1n the amount of -fuel Vfloviing throughthe fuel'noz'zle. Onrf improved carbu'reter can'lihereformgb'y prplerlypositioning the'A adjustable valveseat -1n 5 question,besoadjusted-as to secure ,a proper operation ofN4 the engine'4 withwhich it Vis used when `Clie/saine is runningfvvitloiit load or atlow'speed, and so adjustedas tosecuresuch operation \vith. a minlm'umconsump 0' tionof fuel.

'As the lspeed of -thelengine inexteasesithe resulting suetiivnor`vacuum' 'producing ae- .tion reeluees,` thel"pr essure.w1thin the .airchamber 35 ther i'rflowing from said champussage V3,9 in the' air valvee (pressere:ofzthe4 atmosphere aetingupxvai lyf'u on v'sind' en valve Acauses' it to moveaipyjar ,fthus' moving' the seating portionof saidvalve.' offfom' the 0. adjustable yalye seat 23 and llllu'overmgoi:'opening fthe t auxiliary-lair l.inlet `ports 127.

` Additional r airf will fthus be Vadmitted V.t0-g the 'earhuretereasingtlfiiiugli saidports 'sind befV f the 'rieb Preliminare-minarefemefviith I in the air erating un tions. l

'lhe air inlet ports 27 are obriously opened graduallyv as the air-valve' rises, because of passage 7 when-the engine is 36 uncovers saidports progressivelyr and does not open `them entirely until t ie airvalvev reaches the exi/ent of up wurd movement .offsid air valve isObviously dependentnpon the viii-uum produced withintheair chamber 35.vThe 'rapidity of the upwardmovement of the earbureteradj usted so asvtoseture an approximately uniform' combustible mixture at enginespeedsV vary-ing throughout a wide range, b v means' ofA the 'adjustablevalve 43 an' inlet passage 40; it being obvioug that if air is permittedto flow into the air cham-- ber nearly, as fast iis-it iswithdrawnthere-from-A thr'ough the air passage 39 the valve willreelslowly, while if the iiow through Vthepassage :110 is more' restrictedsaid valve' will rse'more rapidly.V @Finally the inwardly,opening eheekvalve 42 iii-the air passage 40 closes upon a. sudden* or exg'esiveupward movement ofthe air valve, due. ior example, to a sudden openingof the throttle valve which eontrolstli'e;flwto the engine:whereup'oufthe,air chamber 35` will 'act as 'a dash' Vpot and Cushionthe upward Vmovei'uentof.said valve". Said cl1eck-val ve' will not,however, interfere with tl1e downward movement of the air -valvegandisaid valveinoves down and into 4contact with the adjustable valve seat23 and into a position suoli-that 'itsl dp'ridingrim 36 overlie'sandobstrqc-ts "the auxiliary air" inlet 4 ports 27, w'hen'the engine'stopsor its speed is reduced materially'flrelow ,the speed-nt which itnorn'iallypperates. 'l Having thus described land explained ourinvention," we claim md desire to secure -hy 1. `In acarlrureterof theelass deseribed, a

suitable' aSinghav-ing 'a vertically arranged airpassagenjeminunientglon with theaftf 1.1: 'iary air. inle't portsindependent of l,said "air mospliere' ati-ts lower end, a -seriesoi'atinil passage and which. ports a'rejindireet 'oom'- r mun'iatoinfln'ithVthe atmosphere, and4 an L :outlet passage 'through .wliiclrlVAe'ombiistible mixture ,may HQW a uelfsupply nozzle vl-g its uppermostposition; an'd the auxiliary air valve 32 is regu lted, andA whit-hcontrols the flow of air through the 0l i er nornmlspeed and loau condithefact that the depending portion .o r rim' and a val ve fuel tart withthe interior of said casing'. l'ucl .supply vali'e carried liv said aii'and ailapted to control the tloiv ol' through said l'uel .supplyno'/,'/.lc.

1. lu a carliurctci' oll llic class dcscrilicd. a suitable cabineIrhaving'. a vertically arraicd air passage, in coniniunication with thiatmosphere at its loivcr end. a series ol' auxiliaril air inlet ports inconnnunieation with the atmosphere` and an outlet passage through whichconiliiistilile, niixturc uiai' lloii': a l'ucl Supply now/.lc locatedwithin ,said air passage: a vertically adiuslalile ariY nulaivali'clscat `surroundinrr thc upper end of said air pass-age: incausl toradjustingl said valve seat). a icrticalllv inovalilc annu lar air valvelocated within said casinar and havingr an annular portion adapted lo cooperate with the valve seat at thc upper cnil of said air passage. thelower end ol' Vaid valve lying oppositey the ports aforesaid when saidvalve is in its lowcrniod position vand the periphery thereof moving incontact with the interior ol` said raging: and a t'ucl suppl)T valvecarried lilv said air valve alid adapted to 'control thc tlo\\ of fuelthrough said fuel supply nozzle.

Il. `ln a carhurctcr of the class dcscrilicll. a .suitalile easinghavingr u vertically urv ranged air passage in rounnunicatiou with the.atmosphere at its` lower ciuhlatcrallv dis'- poscd ports locatedadjacent thc upper end of said air passage :ind also in communicationwith the atmosphere. and au outlet passage through which coniliustihlcniix ture li'ii)v flow; a fuel supply now/,le located within said airpassage; an annular valve seat surrounding thc. upper cud oll said airpassage; a vertically niovahlc,annular air valve located within saidcasing and adju cent the upper end oisaid iir passagrc and having anannular seating portion adapted to cooperate with the valve scat at theup per end oi' said air passage.` and 'the lower end of which valve liesopposite the ports aforesaid when .said yvalve is in its lowerinostposition:l and a fuel supply valve carried hy said air valve and adaptedto control the [low of l'ucl through said fuel suppl v uof/J/Zle. I

4. ln a carliureter of the. class described, a `suitalile. easing:having.r a vertically arranged air .passage in connuuniea'lion with theatmosphere at its lower enth a series of auxiliarji1 air inlet. portslocated adjacent the upper end of said air passage, andr'also incommunication with the atmosphere, 'and anoutlet passage. through whichconiliustihle mixture unify llow: a. fuel supply now/.le located Vwithinsaid air passage; af vertically adjustahle aluiiihir \'al\'e seatsurroiuidiu air passage; means for adjusting: said valve scat; avertically movable annular iur valve located ivithni saidl casing andadjacent the annular portion Y lunugh and located adiaccut the uppervend of Smidt upper end of said air passage and having an adapted tocoperate with the valve seat at the. upper end of said air passage. the,lower end of said valve lying opposite the ports aforesaid when saidvalve is in its lowerniost position; and a fuel supplv valve :arried h vsaid air valve an adapted to control the flow of fuel through said l'uelsupply'nozzlc.

.3. ln a carliuretcr of the class described, a lsuitalile casinghavingz,r a verticallj.' arranged air passage in communication with theatmosphere at its lower end7 a series of latcialliy disposed auxiliaryair inlet ports located adjacent the upper. end of said air passage andalso in communication with the atmosphere. and au outlet passage throughw hich conihustihlc mixture ina'v flow; a fuel suppl)- nozzle locatedwithin Isaid air passage; :in annular valve seat surrounding the uppercud ot said air passage', a vertically inovalile annular air valvelocated within rsaid casing and adjacent the upper end of s-aid airpassage. said air valve having a portion adapted to cooperate with thevalve `scat at the upper end of said air passage, and a dependingIrportion adapted to ohstruct the flow of air through thel ports aforcsaid ivlie1i said valve is in its lowerniost position; and ca fuel supplyvalve carried h v said air valve, and adapted to control the tloiv offuel through said vfuel supply nozzle.

ti. ln a earliuretcr of the class described, a suitalile. casing havinga vertically arranged air passage in communication with the atmosphereat its lower end, a series of laterally disposed auxiliary air inletports in connnuuieation with the atmosphere, and an outlet passagethrough which combustible niixture ina flow; a fuel supply nozzlelocated within said air passage; an annular valve seat surrounding theupper end of said air passage; a verticallyr movable annular air valveAlocated within and the periphery of which inoves in contact with theinterior said casing. said air valve havin a seating portion adapted tocooperate wit the valve seat at the. upper end of said air passage and adepending portion adapted to obstruct the flow of air through the portsaforesaid when said valve is in its lowermost position;

and a l'iiel supply valve carried by said air` of fuel valve and adaptedto control the How through said fuel supply nozzle.

'i'. ln a. .carhureter ofthe class described, a suitable casing having avertically arranged air passage in communication with the. atmosphereatl its; lower end, a series of auviliariv air 'iiletports in.communicationy i.iiltere. and an outlet passage which combustiblemixture may low: af fuel' aup'ptvnozzlelocated ifi'ith'ii I.'aid niipausagcriui annular projectionlo- 'pued within said castaeltidfstlrrouadi'ng he. upper eiid of said al piliSSggbi; an apl nularvalveseat carried by said 'projection through which' 4combustiblemixture mayv and adjustable thereupon; a verticallymov' flow; a fuelsupply nozzle located within able-annular air valve located within saidsaid air passage; ainannular projection lof-asing. and the lower end ofwhich valve lies cated VWithin said casing A andsurrounding opposite theportsaforesaid when said valve the upper end of said air' passage; anannuis in its lowcrmost position, said valve havlarvalve seat inthreaded .engagement with mi: an annularportion adapted to copeur,` saidprojecticma vertically movableannu 1 *s ate with the valve seat attheupper end `if iur an' valve located within'said casing and said airpassage: and a fuel supply valve.. the loiver end Vol"'\vhich valvelies'oppositecarried hvsaid' air valve and adapted to conthe portsaforesaidV when said valve 1s 1n its trol the `fiovv of fuel throughsaid fuel slup-V ilowermost position, said valveha'vin'gan anplynozzle.- Y Y 5 nular portion adapted to cooperate-wlth the fi. In acarburetor of the class described,"- valve seat'l at the upper endofsaid air pasrauged air passagex in communication with ing` in contact,with the interior of said ca s-V the atmosphere at. .its lower end, aseries of ing; anda -fuelsupplv valve earned by said.

'auxiliary air inlet ports ,1n communication air valve-and adapted tocontrol-the flow of with the atmosphere, and an outlet passage" fue]through said fuel vsupply-npzzle.

through \\hich combustible mixture 'may 11. In a carburetor 'of thoclassdescribed, flow. :i fuel suj'iplv' nozzle located within a suitablecasing'having a vertically arsaidV air passage: an annular projectionlo-V ranged air passage in communication with n Y n i 3 Y a suitable,asing having a vertically arsage, and the peripheryy of said valve movcated. within said casing and surrounding the atmosphere-at its lowerend, a seriespfV the. upper end of said air passage; an an-f auxiliaryair inlet ports in communication .|1i1liir`\'i1lv'e scat carried b vsaid projection with the atmosphermand an Qutlet'passage .i i v. ith theatmosphere, and an outlet passage lowermostposition, scid valve havingan anlfm` *rior of said rasingraud a fuel sup ly valve the j 9. luacarluiretcr of the class deseriheu'l7 a sage suitable casing having aYvertically arranged concentric portions of different diameters,

`upper endof said air passage; an annular'vnozzle.

sage; and afuel supply va'lve carried by said Ssrid au'` and adjustablethereupon; a verticall movthrough which combustible mixture may -alileannularair valve located within said How; a fuel supply nozzle vlocatedWithinv raising and the lower end of which valve said air passage; anannular projection 1olies opposite the ports aforesaid when said catedwithin said casing and surrounding valve is in its lowermost position,saidvalve, thcnpper end of said air passagman annu'- ha ving yau annularportion'adapted to colar valve sia-[ in threaded engagement withoperatiewith the valve seat at the upper end- `said projection; avertically movable annuoi' said air passage, and the periphery of saidvalve moving: in Contact with theintethe lower end of which valve liesopposite carried by 'said air valve and v-a aptcd to lowermost position.said valve having anancon'trolthe flow of fuel through said fuel ,nular`portion adapted to cooperate with the supply nozzle. valve seat at theupper end of said air pasthe inner surface of said casing havingair-passage in communication Wielrthe lituiosphere atfit's'lowc'r end, aseries of auxil-l iary air inlet ports in communication with they`at1iiosphere, and an 4outlet passage concentric portions of saidcasing, whereby through which comhustihle mixture may' an 'air chamberis [provided between' said flow; a fuel supplynozzle located withinvalve and casing; and a fuel valve carried sa'l airpassage; au annularprojection loby said 4'air valve' and adapted to control cated withinsaid casingand surrounding," the the flow of fuel throughsaid fuelsupply 'and the periphery of said air valve having alsoconcentricportions of different d1am- A12. In a carbureter of the class described,a` suitable casing havinga vertically arvalveseatin threadedengagement'with said projection; a verticallymovable annular air valvelocated within said casing and the lower end` of wliichjvalvc liesopposite the portsaiforcsaid when-said valv'e is in its lowerinostpositiomsaid valve having an annuwith the. atmosphere, and an ou'tlctpassage lar portion adapted to coperate with the' through whichcombustible mixture 'may valve seat at'the. upper end of said airpasflow; ,La fuel supply .nozzle located within passage; amannularprojection lothe atmosphere at its lower. end, a series of au' valve and'adapted tocontrol the flow. liu-l through said fuel supply nozzlethe.upper end of said air passage; an annu- 1U. ln a rarhuretenof the dassdescribed. lar valve seat'in threaded engagementA with a suitable.casing having a vertically arg said pojection';'a verticallyinovahlcannura-iigrcd air passage in communication with lar air valve located`within saidcasingand the atmosphere-at its lower end, a series of thelower endmf which valve lies opposite auxiliarvlairinlct ports incommunication the ports aforesaid when said valve is in its lar airvalve located within said casing and port-s aforesaid when saidvalve'isin itsY eters' adapted to movein contact with the ranged air passage incommunication with' auxiliary air inlet ports in communication of catedwithin said casing and s'urrounding'- l -the concentric portions nularportion :n

nular portion adapted to coperate with the valve seat at the upper endof said air passage; the inner surface of said easing having concentric`portions of different diamm eters, and the periphery of said air valvehaving also concentric portions of different diameters adapted to movein Contact with of said easing, wht-rch)v au' air chamber is providedbetween said valve and casing; means for regulating the action of saidair chamber; and a fuel supply7 valve carried by said air valve andadapted to control the flow of fuel through said fuel supply nozzle.

lil. ln a carbureter of the class described, a suitable casing having avertically arranged air passage in communication with he atmosphere atits lower end, a series of auxiliary air inlet ports in eounuunitaitionwith the atmosphere. through which combustible mixture may llow; a fuelsupply nozzle located within said air passage; an annular 'irojectionlocated "within said casing and surrounding the uppereul of said airpassage; an annular valve seat in threaded engagement with saidprojection; a vertically movable annular air valve located within saidcasing and the lower cud of which valve lies opposite the portsaforesaid when said valve is in its loam-most position. said valvehaving an anlapted to cooperate with the valve scat at the upper cud ofsaid air passage; the inner surface of said casing having com-entrieportions of dilferent dian'ieters, and the periphcrjvr of said air valvehaving also concentric portions of different dialnetcrs adapted to movein contact with the concentric portions ot' said casing, whereb)y an airchamber is provided between said valve and casing; au air passageleading from the interior of said casing into said airychaiular: au airpassage leading from the atmosphere into said air chamber; an inwardlyopening chccli valve located in said air passage; lui-ansl Vfor varyingthe area of said air passage; and a Yfuel supply valve carried b v saidair valve and adapted to control the iow of fuel through said fuelsupply nozzle.

14. In a Carhureter of the class described, a suitable casing having avertically arranged air passage in eoinu'iunication with the atmosphereat its lower end, and an'outlet passage through which combustiblemixture may flow. and the inner surface of which easing is formed withconcentric portions of ditlereut diameters; a fue] supply nozzle locatedwithin said air passage; a vertically movable annular air valve locatedwithin said casing and having an enlarged lower end adalited to move incontact with the concentric portion of the casing of the greaterdiameter, and a smaller upper end adapted to move inV Contact with thecolleenand an outlet passage.

trie portion of the easing of the lesser diameter, whereby an airchamber is provided between said valve and casing and above the enlargedlower end ol said 'alve, said Casin being provided with air inlet portslocated adjacent enlarged lower end of tlie air valve and through whichports air may flow past lsaid lower end-and into the interior of saidcasing; and a fuel supply valve carried hy said ai`r` valve and adaptedto control the flow of fuel through said fuel supply nozzle.

15. In a carinii-eter of the class described, a suitable casing havingan air inlet passage in connnunication with the atmosphere; aux iliaryair inlet ports also in communication with the atn'iosphere, and anoutlet passage through which combustible mixture may flow; a fuel supplynozzle located within said air passage; a vertically adjustable valveseat surrounding the upper end of said air passage; a vertically movableair valv'e located within said alsingand having a portion adapted toeoperate with the valve seat at the upper end of said air passageand afuel supply valve carried by said air valve and adapted to control theflow of fuel through said fuel supply nozzle.

lli, In a carburetor of the class described. a suitable casing having anair inlet passage in connuunication with the atmosphere, auxiliar)y airinlet ports also in connnunication with the atmosphere, and an outletpassage through which eombustible mixture may llow; a fuel supply nozzlelocated within said air passage; a vertically adjustable valve seatsurromuling the upper end of said air passage: a verticallyv movable airvalve located within said easing and having a portion adapted tocooperate with the valve seat at the upper end of said air passage; theinner surface of said easing having concentric portions of 'lill'erentdiameters, and the periphery of said air valve having also concentricportionsof different diameters adapted to move in Contact with the concentric portions of said casing, whereby an air chamber is providedbetween said valve and casing; and a fuel supply valve carried liv saidair valve and adapted to control the llow of fuel through saidfuelsupply nozzle.

17. In a carburetor ot' the class described; a suitable casing having avertically arranged air passage in communication with the atmosphere atits lower end, and an outlet passage through which combustible mixture.may flow` and the inner surface of which casing is formed withconcentric por tions of different dian'ieters; a fuel supply nozzlelocated within said air passage; an adjustahle valve seat surroundingthe upper end of said air passage; a vertically mov able air valvelocated within said casing and having an enlarged lower end adapted tomove in contact with the concentric portion of the casing of the greaterdiameter, and a a suitable easing having,lr au having a portion 'chamber is .easing being provided N Ioeated adjacenftl .in terlor of saideasing Supply nozzle.

va suitable easing having a ,air valve loealed Lthe i supplw'valveearrled 45 'eoneentrir smallerupper,end adapted to move in contact withthe coneentrie' portion of the casing ot'- the leaner diameter, wherebyan4 air provided between said valve andr easing; and said valve, saidvalve'havlng a portion adapted to eoperatewith the the upper end of saidail-,passage and said with air inlet ports no en'larged' lower end oftheair valve andithrongh which ports air may flow past saidlower, eneland' into the and a fuel supply valve Carried by? Said air 'alve andadapted to, controlthe of the elaas described, vert iea ily arranged airpassage in eonnnunieation with the atmophere at its lower rnd. a seriesof 'anxiliany air inlet ports in eonnnnnieation 18. In a `arbureterwhieh eombnstible `nuzvture nia \v suppl)l nozzle loi-ated within all'passage; a vei'tieallv .adjustablean- Jjiular valve seat lmrroululingrthe upper end of Said air passage: -me'ans for adjusting said valveleatza vertii-alltr movable annular within said easingr and the lowerend of' 'whieh valve lie` opposite the 'I iortn' aforesaid when laaidvalveisin itslowermost posltionr-sanl valve havin);lr an ptfd 'toroiiperate with .the valve Seat atthe upper end V:if-said air passage;the inner surl'aee ol' said .easinaglr having; eonrentrie portions ol(lill'ei^ent di anieters` and lhe'lwriplleiv ol' Said air valve'l havingalao rom-entrir portions-ol ilitlei'ent 4diameters adapted lo move ineonlaet with annular portion ada the emeentriiportir'nla4 ol said leasing, wherelrv an an' ehaniber is provided between means forregulatingr rhaniber; and a fuel b v said air valve and adapted toeont'rol the flow ol Fuel through .said 'fuel supply now/.lefl

' 19. ln a earbureter of the rlass d ewerilmd,`

a ir inlet -p'aaaagreY m 'eommuniration with the'atmosphere` and an'outlet passage througlrwhieh Veoniluotible'mixtnre may flowxand -theinner surlare of whirl) 'easing has eoneentrig portifnnolE dill'erentdiauuwters; an adjustable valvelmat surrounding the upper end ol saidair inlet, passage: :ofnel supply nozzle loeatel w said air passage; avertically movable annie lar air valve located within Said easing al'ldnl lnpled -lo el'iiipel'ale.\\`lllL said valve havinrr an en llargedlower end adapted to movefin eontael` with the,eoueentrie portion `ol"theeaaing "of the 4greater diameter;` and a smaller upperY ond adaptedto n1ove in rontaet willrthe portion ot'V the easing' ol' thelesserrdiameterz 'whereby an air elunnber said valve and easing: aetionol' said an' said valve seat..

above the enlarged lower end of valve Heat at flow of-fueliln'ou'gh saidfuel an outletpassage di llerent .end adapted to move in Veenrie portionofthe i a Smaller upper end adapted eoneentrre -'por-.

to move in eontaet with'the easing of I -he lesse* diameter.

ilhin ble mixture may "of whleh easlng ranged air inlet passage inmnnnunicaton with the atmoephere :it its lower end, and- `an outletpassage, through which eo`mlmsti,V ble mixture may Ho\v,and the inner'surface of which easing' has concentrie portionsof differentdialnet-eral a fuel supply nozzle lorated withinsaid air `passagge eallvAmovable annular within said easing and having an enlarged lower endadapted to move ineontaet with the eoneentrie portion of` greaterdiameter` and a Smaller npperelnl .adapted to move in eonlaetwithlth'econcentrie portion of the easing of the lesser .dialnwhereby 4an a'irrehamber is provided bk-)tween said valve, and easing and'ihove' the saideasing. h air Inlet ports located 'of the air enlarged 'lower endofeal'd Yvalve being provided wit adjarent the enlarged 'lower end'valve and 'through whielr portal .into the interior of saldi-asin r. Y

Llt n a Yearbureter rif-'llie-lzis dexeribed. a suitable eaeingliavingran airinlet palwnage in eomn'inniration with the atlnoq'ihere and anoutlet passage through whieheombnsti` ble mixture mar flow. and 4theinner snrt'are of Whieh easing has eoneentrie 1 fuel supply nozvfleloeated within Said an' passage; a vertiea'llv movable annular airvalvef loea'ted within Said easing and having an enlarged lower easing:of the greater diam-eter. and

tion of the wher-libran air eliamber is provided between said valve andeasiugfand above the enlarfred lower end of said valve: said easingfbeing. provided witlrair inlet portsloeated adjaeent the enlarged lowerend of the air valve through whieh ports the interim" ol Said easing:-and means for regulating the action of saidair ehamber.

2i. ln Ia ear n'eter ofthe claas described'. a. suitable eaing` having'an air inlet [passage in Communication with the atmosphere, and anoutlet pa wage through' whielr Aeombuat-` lli nu a nd llra carbureter of theolass described,v

g and -a verti-f au' valve located the easing of the" air may llow airniav llow into portionsof eimta'et with the rollL 7 1'20 theinnersurface e han eoneentrle. portions of different diameters: a l'ue'lsupply ,nozzle lo eated lwithin said 0 movable ann ula i' air valvealoeated within Said easing' andA having an enlarged lower end adaptedto unive ineontaet with the ront-engtrie portion .of the easing' of thegreater di. aineler` and a sn|al`ler1lnper-end adapted to more ineontaet with the roncentric ptiixlipnair passage; av vzertifalltr4 irsof the Casing of the lesser diameter, whereby an air chamber is providedbetween said valve and casingand above the enlarged lower end of saidvalve: said casing being provided with air inlet ports located adjacent,the enlarged lower end ot' the air valve and through which ports air mayllow into the interior ol' said casing: an air passage, leading from theatmosphere into said air chamber: and means for var ving the area ofsaid last mentioned air passage.

23. In a carbureter of the class described. a suitable casingr having anair inlet passage in commun' ation with the atmosphere. and an outletpassage through which combustible mixture may llow. and the innersurface ol which casing has concentric portions of dit'- ferentdiameters: a t'nel supply nozzle located within said air passage: avertically movable. annular a-ir valve located within said casing andhaving;` an enlarged lower end adapted to move in contact, with thcconcentric portion ot' the casing of the greater diameter. and a smallerupper end adapted to move in contact 4with the concentric por` tion ofthe casing: ot' the lesser diameter. whereby an air chalnber is providedbetween said valve and casingl and above the enlarget1 lower end ot'said valve: said casing being'l provided with air inlet ports locatedadjacent the enlarged lower end of the air valve and through which portsair may flow into the interior of said casing: an air passage leadingfrom the interior ot' said casing into said air chamber: and an airpassage leading from the atmosphere into said air chamber.

E24. In acarbureter of the class described..

a suitable casing having an air inlet passage in communication with theatmosphere.` and an outlet passage through which combustible mixture mayflow, and the inner surface. ot which casing has concentric. portions ofditI` ferent diameters: a fuel supply nozzle located within said airpassage; a verticallyY movable annular air valve located within saidcasing and having an enlarged lower end adapted to move in contact withthe concentric portion of the casing oti the greater diameter. and asmaller upper end adapted to move in Contact with the concentric p0rtionof the casing of they lesser diameter. wherein` an air chamber isprovided between lsaid valve and casina' and above the enla rged lowerend of said valve: said casing being provided with air inlet portslocated adjacent the enlarged lower end ol' the air valve and throughwhich ports air may llow into the interior ol' said casing; an airpassage leading: from the interior ot' said musing` into the said airchandler: an air passagelading from the atmosphere into said airchamber: and means tor regulating the llow of air through said lastmentioned air passage.

:2.7. ln a carbm'etcr ot the class described. a suitable casinar havingan air inlet passage in communication with the atmosphere. and an ontlctpassage through which combustible mixture may llow. and the innersurface of which casingr has concentric portions ol' dil"- lerentdiameters'. a i'ucl suppl)Y nir/.ale lo cated within said air passage: averticallyn movable annular air valve located within said casing andhaving an enlarged lower end adapted to move in contact with theconcentric portion ol' the casini;lr oi' the greatediameter. and asmaller upper end adapted to move in contact with the concentric portionot' the casing of the4 lesser diameter. whereby an air ohamber isprovided between said valve and casing and above the enlarged lower endol. said,valve: said casintr being provided with air inlet ports locatedadjacent the enlarged lower end of the air valve and through which portsair may llow into the interior ol' said casing'. an air passage leadingfrom the interior oi said casing;r into said air chamber; an air passageleading from the atmosphere into said air chamber; an inwardlyv open uheck valve located within said last mentioned air passage: and means forregulating the tiow of air through said last mentioned air passage.

In testimony whereol'. we have signed our names to this specificationthis 25th day o'l Februaryv 19H3.

JOHN JAY l'li\\\"1\'llllll5'l`. Jn. EIHVAND FRANK NICOLAI.

